Engine cooling apparatus



March 28, 1944. BRADLEY I 2,345,233

ENGINE COOLING APPARATUS Filed Jan. 22, 1945 INVENTUR EERDUN PATRICKBRADLEY E1 Patented Mar. 28, 1944 ENGINE COOLING APPARATUS GordonPatrick Bradley, Vancouver, British Columbia, Canada Application January22, 1943, Serial No. 473,234 In Canada December 23, 1942 3 Claims.

tions best.

Another object is the provision of apparatus for the purpose describedwhich may be adjusted while the engine is running.

A further object is the provision of apparatus designed to prevent thecooling system of a marine engine from draining when it is not in use.

A still further object is the provision of engine cooling apparatus bymeans of which the amount of cooling medium circulating through theengine jacket may be reduced without interfering with the operation ofthe pumping means.

With these and other objects in view, the present invention consistsessentially of cooling apparatus for internal combustion engines havingjackets through which a cooling medium may be circulated, comprisinginlet means for directing a cooling medium into the jacket of an engine,outlet means for removing the medium from the jacket after it hascirculated therethrough, and means for by-passing at least some of themedium directly from the inlet means to the outlet means, as more fullydescribed and illustrated, by way of example, in the followinspecification and the accompanying drawing, in which Figure 1 is adiagrammatic side elevation of an engine jacket or block with one formof cooling apparatus,

Figure 2 is a plan view thereof,

Figure 3 is a view similar to Figure 1 illustrating an alternative fonnof cooling apparatus,

Figure 4 is an enlarged sectional view of the valve used in'Figures 1and 2,

Figure 5 is a view similar to Figure 4 with the valve set in a difierentposition, and

Figure 6 is an enlarged sectional view of the valve used in Figure 3.

Referring more particularly to Figures 1 and 2, l0 represents the jacketor block of a marine engine to which a cooling medium, usually water, isdirected in any suitable manner. A pipe ll may be connected directly tothe water inlet of the jacket or, as shown, it may be connected to anexhaust manifold l2 of well-known construction having a suitable waterjacket, in

which case a pipe or hose 13 connects said manifold to the inlet. Thepipe ll alone or with the manifold l2 and the pipe l3 form inlet meansfor directing water into the jacket to be circulated therethr-ough. Anoutlet pipe l4 extends from the top of the jacket and forms an outletfor the water. Suitable means, such as a pump I5, is connected to thepipe II for circulating water through the jacket and out through thepipe I4. A pipe l6 extends from the pump outside the boat (not shown) inwhich the engine is mounted or, if it is a recirculating system, thispipe may be connected to the pipe M.

A by-pass pipe I'I extends from the inlet means to the outlet pipe 14 inorder that at least some of the water may be by-passed around thejacket. The amount of water by-passed depends upon the size of the pipel1, although it is preferred to make this pipe substantially the samesize as the pipe H and to provide a valve l8 at the juncture of thepipes 14 and H, with another pipe extending from said valve. Actually,the pipe 20 is merely a continuation of the pipe M.

The valve l8 has a valve segment 2| rotatably mounted therein andoperable by means of a lever 22 outside the valve. If desired, anoperating rod 23 may be connected to the lever 22. The segment 2| is ofsuch size that the pipe 20 is always open, while the pipe I4 is alwaysat least partially open. The segment is located so that.

it may be turned to open pipe I1 and close pipe l4, and vice versa. Themore one pipe is opened, the more the other pipe is closed, see Figures4 and 5. Any suitable means may be provided for preventing the pipe Hifrom being completely shut off, such as, for example, a pin 24projecting outwardly from the segment through a slot 25 formed in thecasing of the valve, whereby the pin, by striking the ends of the slot,limits the extremities to which the segment may be moved.

In operation,

the pump 15 directs water through the pipe ll, manifold l2 and pipe l3into the jacket l0, whence it is discharged through the pipe l4, valve18 and pipe 20. The valve l8 may be operated by means of the lever 22 toregulate the amount of water passing through the jacket and the by-passpipe H. In this way, the running temperature of the engine may be raisedor lowered as desired. The more ture tem, thereby destroying thesyphoning actiontendingto drain the block whenthe engine is stopped.This also applies in the event of Water pump failure.

As a rule, the manufacturer specifies the temperature at which theengine performs best. The engine may be run at a normal operating speeduntil it is properly warmed up. Then the control valve is used to directmore or less water through the jacketuntil the water reaches andmaintains the desired temperature. The valve may be set in thisposition. This operation may be repeated any time it is found necessaryto regulate the normal temperature of the water. It will be noted thatany reduction of the amount of water flowing through the jacket does notinterfere with the pump since the total volume of water therefrom passesthrough the jacket andthe by pass.

' Figures 3 and 6 illustrate an alternative form of the invention. Inthis case, the pipe I I may be connected directly to the control valveIB located above the top of the jacket, or, as shown, it may beconnected to any known type Of oil cooler 30, which, in turn, isconnected to the valve by a pipe 3|. Another pipe 32 connects the valveto the water inlet of th jacket 10 while a bypass pipe 33 connects saidvalve to the outlet pipe M. The pipe II, with or without the cooler 30and pipe 3|, and the pipe 32 form inlet means for directing water intothe jacket. The pipes ll, 3| and 32, or H and 32 actually form acontinuous pipe with a portion thereof between its ends elevated abovethe top of the jacket. In this alternative, the valve segment 2! islarger than that of Figures 4 and 5. This segment is of such size and isso arranged that the inlet pipe 3| is always open, while the pipes 32and 33 are controlled to regulate the amount of water flowingtherethrough in'relation to each other. The pin24 in its slot 25prevents the pipe 32 from being completely shut off. With thisarrangement, the total amount of water provided by the pump I5 isproportioned between the engine jacket and the by-pass 33 to control therunning temperature in the jacket, as described above and with all theadvantages there set'ou't.

This form of the invention has another advan-' tage The pip 32 extendsfrom the water inlet of the jacket up to the valve I8 above the topthereof so that the water cannot drain from the jacket when the engineis not functioning, thus insuring a supply of Water in the jacket-whenthe engine is-started. This is an important feain marine engines,because often the water drains out of a jacket and when the engine isstarted, the cylinder head and walls become overfor preventing theheated before the cold water first hits them. This commonly results in acracked engine head.

Although engines having a single block or jacket have been referred tothroughout this specification, it is to be understood that this includesengines having individually jacketed cylinders.

From the above, it will be seen that means have been provided forcirculating a cooling medium through the jacket of an engine which maybe adjusted to maintain the operating temperature of the engine at adesired point, and which prevents the jacket from draining when it isnot in use.

Various modifications may be made in this invention without departingfrom the spirit thereof or the scope of the claims, and therefore theexact forms are to be taken as illustrative only and not in a limitingsense, and it is desired that only such limitations shall be placedthereon as are disclosed in the prior artorare set forth in theaccompanying claims.

What I claim my invention is:

l. Cooling apparatus for internal combustion engineshaving jacketsthrough which a cooling medium may be circulated, comprising an inletpipe connected to the jacket of an engine, a portion of said pipebetween the ends thereof being elevated above the top of the jacket, anoutlet pipe extending from the jacket, pumpin means for directing acooling medium through the inlet pipe, the jacket'and the outlet pipe,and a bypass pipe connecting the elevated portion Of the inlet pipe tothe outlet pipe, whereby at least some of the cooling medium may passthrough the by-pass pipe instead of the jacket.

2, Cooling apparatus for internal combustion engines having jacketsthrough which a cooling medium" may be circulated, comprising an inletpipe connected to the jacket of an engine, a portion of said pipebetween the ends thereof being elevated above the top of the jacket, anoutlet pipe extending from the jacket, pumping means for directing acooling medium through the inlet pipe, the jacket and the outlet pipe, aby-pass connecting the elevated portion of the inlet pipe to the outletpipe, and valve means at the juncture of said pipes for regulating theamount of cooling medium passing through the jacket and the by-passpipe.

3. COOliIlg apparatus for internal combustion engines having jacketsthrough which a cooling medium may be circulated, comprising an inletpipe connected to the jacket of an engine, a portion of said pipebetween the ends thereof being elevated above the top of the jacket, anoutlet pipe extending from the jacket, pumping means for directing acooling medium through the inlet pipe the jacket and the outlet pipe, aby-pass pipe connecting the elevated portion of the inlet pipe to theoutlet'pipe, valve means at the juncture of said pipes for regulatingthe amount of cooling medium passing through the jacket and the by-passpipe, and means on the valve'means 1y shut off from the jacket.

GORDON PATRICK BRADLEY medium from being complete

